Patent GB-510601-A (GB)
Title: Improvements in riveting machines and the like
IPC: A41H37/02
Filed: 1938-02-02
Abstract: 510,601. Riveting. SOC. D'EXPLOITATION DE BREVETS ET LICENCES POUR APPLICATIONS MECANIQUES. Feb. 2, 1938, Nos. 3290 and 3291. Convention dates, Feb. 2, 1937, and Feb. 13, 1937. [Class 83 (iv)] [Also in Group VII] In riveting by means of a solid or hollow rivet element the work is held by a supporting member against the:force of penetration of the rivet driven by a movable inserting tool until the desired penetration has been attained, whereupon the said supporting member is driven, positively and independently of the presence of the work, so as to participate in the movement of the tool. The invention is described as applied riveting by means of telescoped hollow rivets or eyelets. The supporting member 1, Fig. 1, is mounted on a vertical rod 2 forced upwards by a coil spring 3 to an extent limited by a shoulder 6 on a guide rod 5. As the tool-holder 17 is depressed by a lever 18, the mandrel 9 picks up a hollow male rivet element 13 at the position shown and brings it into contact with the work piece 15 already drilled with a small hole 16 and positioned over an opening 8. The mandrel retreats into the positioning tool 10 against the action of a spring 19, weaker than the spring 3, until the tool touches the rivet element 13 and forces it into the hole 16, the work being deformed downwardly around the hole as shown in Fig. 4. A stop 20 thereupon contacts with the end 21 of rod 2 and the work and supporting member move in unison with the tool holder 17 and tool 10, while lower tube 22 rises bringing with it the lower tool 12 and the female rivet element 14. The top 12a of the tool 12 is of truncated conical shape and is so arranged that it penetrates into the male element before the latter penetrates into the female element. A pin 11 urged upwardly by a spring 23, contacts with the mandrel 9 and when a shoulder 25 contacts with the base 24 iof the pin, forces the mandrel upwards out of the male rivet element. Riveting is effected by a groove 12b which turns over outwards the edge 13b of the male element. The mandrel is grooved horizontally and has two flat sides whereby it distorts the 'male element sufficiently to grip it. The space betwen the two riveting tools at the moment of maximum pressure can be adjusted by a screwed member 35, Fig. 6, bearing against the bottom end of a rod 33 engaging the base of the sleeve 26 housing the spring 33. A heavy spring 41 supporting the sleeve 45 bearing the adjusting member 35 prevents the machine from jamming if used on material which is too thick.: The lower riveting-tool is provided with a spring-loaded finger 146 (Fig. 10) which removes from the rod 124 any rivet element that may for any reason have been left thereon. A groove 143 is provided to house this finger as the matrix 141 rises again. Both rivet elements are fed into position simultaneously by two distributors 104, 105, (Fig. 7), mounted on a common oscillating shaft 106. The lower portion 109 of the distributor 105 is made substantially horizontal and makes with its upper portion 108 an angle sufficiently near to 90 degrees to enable the rivet elements to be fed along it by the inertia effect of the periodic withdrawal of the distributor from its feeding position. Specifications 379,682 and 479,796 are referred to.